OpenALPR is an open source Automatic License Plate Recognition library written in C++. The library analyzes images and identifies license plates. The output is the text representation of any license plate characters found in the image.

The OpenALPR utils package contains a collection of binaries that help with training new data. The following binaries are included:

openalpr-utils-calibrate - Calibrates the software for cameras capturing plate images at an angle

openalpr-utils-benchmark - Benchmarks accuracy/speed against a testing dataset

openalpr-utils-tagplates - Utility to tag the location and plate number for testing and training

openalpr-utils-classifychars - Extracts character images from cropped plate images for OCR training

openalpr-utils-prepcharsfortraining - Reformates character images into a format that Tesseract can use for OCR training